Why am I not able to send texts via my mobile carrier on my iPhone?

With the mysms Messenger for iPhone you’re able to send free mysms friends messages to other mysms users, no matter if your friend owns an iPhone or Android. Due to restrictions of Apple it is not possible (for any third party apps like mysms) to send texts via your mobile carrier (real SMS) on your iPhone or any other device. This is the reason, why the app on iPhone only shows your mysms friends messages.